KR100188548B1 - Switch device and electronic instruments equipped with the switch device - Google Patents

Abstract

The electronic device equipped with the posture detection switch of the present invention, when the device itself has a specific posture, the posture detection switch 19 detects this and outputs the position signal, and the CPU 15 receives the switch signal and receives the liquid crystal display device ( The lighting device 21 illuminating 17 is driven. This drive is executed only when, for example, a plurality of pulses are generated within a predetermined time or when the switch signal is continuously output for a predetermined time, and is not executed simply by generating a switch signal. The device 21 is frequently driven to prevent the battery life from shortening.

Description

Electronic device with switch device and switch device

1 is an external view of a digital electronic watch according to the present invention.

2 is a circuit block diagram of the digital electronic watch of FIG.

FIG. 3 is a diagram showing the configuration in the RAM of FIG.

4 is a front cross-sectional view of the posture detection switch of FIG.

5 is a cross-sectional view taken along the line A-A in FIG.

6 is a view showing a state in which the digital electronic watch of FIG. 1 is mounted on a person's wrist and the wrist is shaken back and forth.

FIG. 7 is a view showing a state in which the digital electronic watch of FIG. 1 is inclined repeatedly in the 6 o'clock and 12 o'clock directions when the wrist is mounted on a person's wrist and the wrist is raised.

FIG. 8 is a front sectional view showing an operating state of the switch device when tilted downward by shaking in the 6 o'clock direction in FIG.

FIG. 9 is a front sectional view showing an operating state of the switch device when tilted downward by shaking in the 12 o'clock direction in FIG.

10 is a flowchart of an illumination control process executed by the CPU of FIG.

FIG. 11 is a diagram showing ON signal detection conditions of the posture detection switch to be processed in the illumination control process of FIG.

12 is an external front view of a second embodiment of the present invention.

13 is a circuit block diagram of a second embodiment.

FIG. 14 is a diagram showing the configuration of the registers of the RAM shown in FIG.

FIG. 15 is a diagram showing the configuration of the LCD 17 of FIG.

16 is a flowchart showing the overall operation.

FIG. 17 is a flowchart of key processing of FIG.

18 is a flowchart of the detection process of FIG.

19 is an explanatory diagram of a display state.

20A and 20B show detection signals of the posture detection switch 19. FIG.

* Explanation of symbols for main parts of the drawings

4,19: Attitude detection switch 14a: display register

14b: Time register 14c: Timer register

14d: coefficient register 15: CPU

16: display driver 17: LCD (liquid crystal display device)

21: lighting device 21a: EL automatic display mark

41: housing 42, 43: fixed contact

45a: conductive sphere member

The present invention relates to a switch device suitable for application to an electronic device mounted on a wrist such as a watch and the like and an electronic device having a switch device.

Background Art In recent years, wristwatches have been widely used to digitally display time-dates and the like using liquid crystal display panels. As described above, in a wristwatch using a liquid crystal display panel on a dial, the display contents may be viewed by external light during the day, but the display contents may not be seen at night or in a place where there is no illumination, so there is a built-in lighting device to illuminate the liquid crystal display panel. The lighting device is turned on by operating the lighting switch. In addition, even in an analog clock that displays the time as a guideline, the needle position cannot be seen in a dark place. For example, an EL (electric luminescence) is used for the dial, and the EL is made to emit light by a switch operation. .

However, in the conventional lighting switch installed in the wristwatch, the operation is often performed in a dark place at night, there is a problem that the operation is cumbersome and easy to cause incorrect operation.

In particular, in the sports wristwatch equipped with a stopwatch function, since a lot of operation switches are provided, there is a problem that the display switch is disturbed by operating another switch by erroneous lighting switch and the operability is poor.

Another problem is that the lighting device is inadvertently turned on to increase power consumption and shorten the life of the battery incorporated in the wristwatch.

An object of the present invention is to provide a switch device for stably operating various devices embedded in an electronic device mounted on a wrist, and reducing power consumption, and an electronic device including the switch device.

In order to achieve the above object, the present invention provides a display means for displaying information, a posture detection switch means for detecting a posture and outputting a switch signal when the posture is at a specific posture, and a switch signal output from the posture detection switch means. And lighting means for illuminating the display means and controlling means for validating or invalidating the operation of the lighting device by the switch signal.

With such a configuration, in the present invention, the switch device can execute stable switch operation without inadvertently turning on or off.

In addition, it has the effect of reducing the lighting of the inadvertent lighting and save the power consumption of the electronic device.

[First Embodiment]

1 is an external view of the digital electronic watch 1 (hereinafter referred to as the watch 1), and the watch 1 is a liquid crystal displaying time and date in the case 2 and the case 2. The display unit 3 (LCD 17 to be described later) and the posture detection switch 4 which detects the inclination of the watch 1 and operates the switch are housed.

2 is a circuit block diagram of the watch 1 shown in FIG.

In the figure, the watch 1 includes an oscillator 11, a frequency divider circuit 12, a ROM 13, a RAM 14, a CPU 15, a display driver 16, an LCD 17, a key input unit ( 18), the posture detection switch 19, the driver 20, and the illumination device 21 are comprised.

The oscillator 11 oscillates and outputs a reference clock signal of 32.768 kHz, for example, to generate an operating timing clock signal in each part of the watch 1 and outputs it to the frequency divider circuit 12.

The divider circuit 12 divides the reference clock signal input from the oscillator 11 to generate a timing signal and a clock signal of a predetermined period and supply the same to the CPU 15 and other circuits.

The ROM (Read Only Memory) 13 stores micro programs, such as a clock processing program, a display processing program, and an illumination control program, which the CPU 15 executes.

The RAM (Random Access Memory) 14 detects the display register 14a that stores the display data, the time register 14b that stores the current time data, and the posture detection suite 19, as shown in FIG. A timer register 14c for setting a signal detection time and a count register 14d for counting the number of times of detection by the detection signal of the posture detection switch 19 to store the count value N are provided.

The central processing unit (CPU) 15 controls each part in the watch 1 in accordance with various control programs in the ROM 13. Specifically, when the time clock signal is input from the frequency divider circuit 12, clock processing and display processing are executed, and the current time data of the time register 14b in the RAM 5 is sent to the display register 14a. Is output to the display driver 16 and displayed on the LCD 17. In addition, other various processes are executed in accordance with various instruction signals input from the key input unit 18.

In addition, the CPU 15 executes an illumination control process to be described later, and outputs a control signal for turning on the illumination device 21 to the driver 20 to turn on the illumination device 21.

The display driver 16 displays the LCD according to the display data processed and inputted by the CPU 15 and the display data processed and inputted by the CPU 15 according to the key operation on the key input unit 18. (17) is driven to display the contents.

The key input unit 18 is constituted by a time setting key, a date setting key, and the like, and outputs an instruction signal by each key operation to the CPU 15.

The posture detection switch 19 has a function as a posture detection means and is the same as the posture detection switch 4 housed in the case 2 of the watch 1 as shown in FIG. The configuration of (4) will be described with reference to FIGS. 4 and 5.

In the posture detection switch 4, the upper end of the wrist is positioned at the 6 o'clock direction of the watch 1 in FIG. 4 and the left end of the fourth watch is located at the 12 o'clock direction of the wristwatch 1, respectively. The wrist is above the clock 1 and parallel to the upper surface, for example, the upper surface of the case 2, and the lower portion thereof is below the wristwatch 1, and the wrist is parallel to the lower surface of the case 2, for example. It is stored in the clock 1.

The posture detection switch 4 is accommodated in the hole 41a formed in the housing 41 made of synthetic resin so that the conductive first fixed contact 42 and the second fixed contact 43 face each other. Specifically, the first fixed contact point 42 is disposed at the 12-direction end of the watch 1 in the hole 41a, and the second fixed contact point 43 is disposed at the 6 o'clock end.

The first fixed contact point 42 has a extending end 42a extending in the 6 o'clock direction, and the second fixed contact point 43 has the extending end of the first fixed contact point 42 in the 12 o'clock direction. It has the extending | stretching edge part 43a extended in the state which opposes 42a. Moreover, the extending edge part 42a of the 1st fixed contact point 42 has the inclined end part 42b inclined in the direction of the extension edge part 43a of the 2nd fixed contact point 43 at the front-end | tip part.

Further, metallic caps 44a and 44b are disposed outside the fixed contacts 42 and 43, respectively, and the caps 44a and 44b are respectively soldered and bonded to wiring on a circuit board (not shown). Second fixed contacts 42 and 43 are electrically connected to the CPU 15.

As shown in FIG. 5, which is the cross-sectional view of the arrow AA in FIG. 4, the housing 41 is provided on the bottom face of the first fixing contact 42 on the bottom surface of the extending edge portion 42a. The inclined surface 41b which inclines in the () direction is formed.

Two conductive sphere members 45a and 45b are housed in the hole 41a so as to be movable, and the diameters of the conductive sphere members 45a and 45b are larger than the distance between the extension end portion 42a and the extension end portion 43a. It is small and formed larger than the distance between the tip end of the inclined end part 42b and the extending | stretching edge part 43a.

Next, the operation will be described.

The wristwatch 1 of this embodiment is mounted on the wrist of a person as shown in FIGS. 6 and 7 and the wristwatch 1 is mounted on the wrist as shown in FIG. In the normal use state of shaking repeatedly, the posture detection switch 4 is inclined toward the lowest direction at the 3 o'clock position.

In this state, the posture detection switch 4 moves in the direction in which the conductive sphere members 45a and 45b are positioned at the 3 o'clock position by their own weight, as shown by the broken line A in FIG. ) And the second fixed contact 43 are in a separated state.

At this time, since the inclined end portion 42b is formed at the distal end portion of the extending portion 42a of the first fixed contact point 42, the conductive sphere member 45a is formed by the inclined end portion 42b as shown by the broken line B. FIG. Although it moves in the direction of the 2nd fixed contact 43, since it moves unilaterally to the 3 o'clock direction side, it does not become conductive with the 2nd fixed contact 43. As shown to FIG.

Therefore, the posture detection switch 4 stably maintains the off state.

In addition, as shown in FIG. 7, the posture detection switch 4 is shown in FIG. 8 when the wrist is bent so that the wristwatch 1 is positioned in front of the eye and tilted in the direction where the 6 o'clock direction is the lowest. As shown in the enlarged view, the conductive sphere members 45a and 45b move in the 6 o'clock direction by their own weight.

The conductive sphere member 45a on the side of the second fixed contact 43 is moved by the inclined end portion 42b of the first fixed contact 42 as the second fixed contact 43 moves in the direction of the second fixed contact 43. The inclined end portion 42b and the second fixed portion which are guided in the direction of the extending edge portion 43a of the c) and abutting against the extending edge portion 43a of the second fixed contact point 43, which is the extension end portion 42a of the first fixed contact point 42; The extension end portion 42a of the contact 43 is electrically connected to the on operation state.

In addition, the conductive sphere member 45b on the side of the first fixed contact point 42 moves in the direction of the second fixed contact point 43 by its own weight, and moves the conductive sphere member 45a to the extending end portion of the first fixed contact point 42. The first fixed contact 42 and the second fixed contact 43 are stably connected between 42a and the extending end portion 43a of the second fixed contact 43.

In addition, when the 12 o'clock direction is inclined in the direction which is the lowest, the posture detection switch 4 moves the conducting ball members 45a and 45b in the 12 o'clock direction by their own weight as shown in the enlarged view in FIG. do.

The conductive sphere member 45a on the side of the second fixed contact point 43 is moved to the extension end portion 42a by the inclined end portion 42b of the first fixed contact point 42 as it moves toward the first fixed contact point 42. It moves, and it is in the state separated from the 1st fixed contact 42 and the 2nd fixed contact 43 again.

Therefore, if the wristwatch 1 is repeatedly tilted in the 6 o'clock direction and the 12 direction, the posture detection switch 4 repeats the on / off operation and the on signal is repeatedly output to the CPU 15 during the on operation. The lighting control process described later is executed by the CPU 15 to output a control signal to the driver 20, the lighting device 21 is turned on by the driver 20, and the LCD 17 is connected to the lighting device 21. Lighted by

Next, the lighting control process executed by the CPU 15 will be described with reference to the flowchart shown in FIG.

First, as shown in FIG. 7 and FIG. 8, when the wristwatch 1 mounted on the wrist faces 6 o'clock, the on-signal is input to the CPU 15 by the posture detection switch 19. This on-signal is detected. (Step S1). In following step S2, it is checked whether the timer of the time measurement which sequentially adds the content of the timer register 14c in RAM14 over time is running. When the timer is not in operation, the timer operation is started (step S3). Next, the content N of the coefficient register 14d in the RAM 14 is up counted (+1) by one (step S4).

Subsequently, it is determined whether the count value N up counted in step S5 is larger than a predetermined reference value NO, for example, a numerical value 5. When it is determined that the count value N is equal to or larger than the reference value 5, the control signal is output to the driver 20, and after the processing for turning on the lighting device 21 for a predetermined time (step S6), the counter register 14d is performed. The count value is deleted (step S8), the timer is reset (step S9), and the present process ends.

In the flowchart, when the on signal input from the posture detection switch 19 during the operation of the timer is five or more times, that is, output six times, the lighting device 21 is controlled to be turned on. And the dispensing time are shown in FIG. In this drawing, the lighting device 21 is turned on for a predetermined time, for example, 3 seconds.

When it is determined in step S5 that the count value N is less than the reference value 5, it is determined whether or not the timer has timed up, that is, whether or not 3 seconds has been exceeded in the contents of the timer register 14c (step S7). If the time is not up, the process returns to step S1 to repeat the processing of steps S1 to S6. When time up, the count value of the coefficient register 14d is deleted (step S8), the timer is reset (step S9), and the present process ends.

Therefore, the watch 1 is repeatedly tilted in the 6 o'clock and 12 o'clock directions so that the illumination device 21 is turned on for a predetermined time, for example, only when the on signal of the posture detection switch 4 is detected six times within three seconds. The lighting can be turned on for 3 seconds, and the lighting operation of the stable lighting device 21 can be executed without inadvertently on / off the running light, inadvertent operation of another switch, or the like.

As a result, it is possible to reduce power consumption of the watch 1 by reducing inadvertent lighting, and extend the life of the built-in battery.

In the above embodiment, the on detection signal is detected by the posture detection switch 19 six times for three seconds as a condition for turning on the illuminating device 21. However, the lighting condition may be arbitrarily changed.

In addition, the illuminating device 21 is an EL (electrical luminescence) device, and is disposed below the LCD 17. However, other devices such as lamps and LEDs may be used as the lighting device.

Second Embodiment

12 to 15 show a second embodiment of the present invention.

In FIG. 12, the watch 51 has a case 52 and a liquid crystal display 53 for digitally displaying a date and time. An attitude of detecting the inclination of the watch 51 body inside the case 52. It has a detection switch 19. In addition, an illuminating device composed of an electric luminescence or the like described later is provided behind the liquid crystal display portion 53. In addition, two switches S3, S4 are provided on the surface of the case 52, and three switches S1, S2, S5 are provided on the side surface.

The switch S1 is a mode switch for operating when the operation mode is switched, and the switch S2 is an EL auto-off mode and a posture detection switch 19 which do not turn on illumination even when an on signal is input from the posture detection switch 19. It is a switch to switch the EL auto on mode that automatically turns on the light for a certain time when the on signal is input from. The switch S3 is a switch for manually turning on the illumination, and the switches S4 and S5 are switches for time correction and the like.

13 is a circuit block diagram of the watch 1. The only difference between FIG. 2 and FIG. 2 is that the speaker 60 driven by a signal from the CPU 15 is provided. The other block is the same as FIG. Omit. In addition, the key input unit 18 includes various registers shown in FIG. In addition, the LCD 17 has a display electrode as shown in FIG. 15 to be described later, and the CPU 15 stores micro programs such as executing the flowcharts shown in FIGS.

FIG. 14 is a diagram showing the configuration of the registers of the RAM 14. FIG. The RAM 14 stores a display register 61 for storing display data to be displayed on the LCD 17, a current time register 62 for storing the displayed date and time data, and an elapsed time since the illumination is automatically turned on. A three-hour timer 63 for measurement, an alarm time register 64 for storing the set alarm time, a stop watch register 65 for storing the stopwatch measurement time, and a state of a predetermined posture for a predetermined time (for example, two seconds). ), A recovery register 66 for storing the number of times, a cumulative time register 67 for storing the accumulated value of the time in which the state of the predetermined posture continues, and a 2 second timer 68 used for counting for 2 seconds. It is installed.

In addition, a mode register (M) for storing numerical values corresponding to the operation mode, a register (LO) for storing information indicating whether the lighting is to be automatically turned on or off automatically, and a register (LO). A register L1 for temporarily storing the contents of the message, a flag F indicating whether or not the stopwatch is being measured, and a flag G indicating whether or not the lighting device 21 is lit.

In the mode register M, " 0 " is stored when the operation mode is the clock mode, " 1 " is stored in the stopwatch measurement mode, and " 2 " is stored in the alarm setting mode. In addition, "0" is stored in the register L0 when the lighting is set to be turned off automatically, and "1" is stored when the lighting is set to be turned on automatically. In the flag F, "1" is set when the stopwatch is being measured, "0" is set when the measurement is stopped, and the flag G is set to "1" when the lighting device 21 is on, and "0" when it is off. Is set.

FIG. 15 shows a display segment of the LCD 17. For example, during stopwatch measurement, the lap time is displayed on the upper end X and the stopwatch measurement time is displayed on the lower end Y. FIG. When the lighting device 21 is set to a mode that automatically turns on or off, the EL automatic display mark 21a lights up to notify the user.

In addition, since the specific structure of the attitude | position detection switch 19 is as showing in FIG. 4 thru | or FIG. 9, description is abbreviate | omitted.

Next, the operation of the embodiment having the above-described configuration will be described with reference to the flowcharts of FIGS. 16, 17, and 18 degrees.

The CPU 15 is normally in the hold state of Step S0 in FIG. 16, and when timing timing is reached, proceeds to the timing processing of Step S2, and when key input is detected, proceeds to the key processing of Step S1.

Here, the contents of the key processing of step S1 will be described with reference to the flowchart of FIG.

First, it is determined whether or not the key operated in step S31 of FIG. 9 is the S1 key. If it is determined that the key operated by this discrimination is the S1 key (YES), the flow proceeds to step S32 to increase the value of the mode register M by "1". In the next step S33, it is determined whether the value of the mode register M is "1", that is, whether the current operation mode is the stopwatch mode. If it is determined by the determination that M = 1 stopwatch mode, the process proceeds to step S34, where the contents of the register L0 are transferred to the register L1, and in the next step S35, "1" is set in the register L0 to illuminate. An EL automatic mode is set in which the device 21 is automatically turned on by the on signal from the posture detection switch 19.

In this manner, when the mode is switched in the above process to become the stopwatch mode of M = 1, " 1 " is set in the register L0, and the EL automatic mode is automatically turned on by the detection signal of the posture detection switch 19. Is set.

At this time, the contents "0" stored in the register L0 are retracted to the register L1, and the contents "0" are converted to the register L0 when the stopwatch board is switched to the alarm setting mode of M = 2 by the following process. To return.

If it is determined in step S33 that the value of the mode register M is not "1", the flow advances to step S36 to determine whether the value of the mode register M is "2", that is, whether the operation mode is the alarm setting mode. Determine whether or not. When it is determined that the alarm setting mode is M = 2 for each edition, the flow advances to step S37 to return the value "0" saved to the register L1 to the original register L0.

On the other hand, if it is determined in step S31 that the operation of the S1 key is not performed, the flow advances to step S38 to determine whether the operation of the S2 key is performed. If it is determined by the determination that the S2 key is operated, it is determined in step S39 whether the value of the mode register M is "0", and when it is determined that M = 0, that is, the watch mode of M = 0. If the S2 key has been operated, the process proceeds to step S40, the value of the register L0 is inverted, and the time timer 33 is deleted in the next step S41.

On the other hand, if it is determined in step S39 that the value of the mode register M is not M = 0, the process proceeds to step S42 and whether the value of the mode register M is "1", that is, M = 1 It is determined whether the S2 key has been operated in the stopwatch mode. If M = 1 is determined by this determination, the flag F is reversed in the next step S43.

When the flag F is "1", time measurement of the stopwatch is performed. That is, in the stopwatch mode of M = 1, the stopwatch measurement can be started or stopped by operating the S2 key.

If it is determined in step S38 that the operation is not the S2 key, the flow advances to step S44 to determine whether the operation of the S3 key is performed. When it is determined that the operation operated by this determination is the S3 key, the lighting device 21 is turned on while the S3 key is operated with the flag G as "1".

If it is determined in step S44 that the operation is not the S3 key, then the S4 and S5 keys and the like are operated, in which case the other key processing in step S46 is executed.

Here, with reference to Fig. 19, the operation mode switching when the S1 key is operated will be described. First, in the clock mode A displaying the date and the current time, when the S1 key is operated, the mode changes to the stopwatch mode shown in B. FIG. In this stopwatch mode, operation of the S2 key starts measurement of the stopwatch time, and operation of the S2 key stops again.

When the S1 key is operated in the stopwatch mode, the alarm setting mode shown in C is switched. In this alarm setting mode, alarm time can be set or canceled. When the S1 key is operated in the alarm mode, the watch returns to the clock mode.

Returning to Fig. 16, when the timing is timed when the CPU 15 is in the hold state, the time processing of step S2 is executed. In this timekeeping process, the time is posted based on the clock signal output from the frequency divider circuit 12, and the date and time data obtained are stored in the current time register 62. In the next step S3, it is determined whether or not the flag F is "1", that is, whether or not the stopwatch is being measured. If the flag F is in stopwatch measurement, the flow advances to step S4 to execute the time measurement process. In this time measurement process, the elapsed time since the start of the stopwatch time is measured by counting the clock signal output from the frequency divider circuit 12, and the elapsed time after the start of the stopwatch time measurement is measured and measured. The result is stored in the stopwatch register 65.

When the determination of step S3 is NO or after step S4, the flow advances to step S5 to determine whether or not the current time coincides with the set alarm time.

If the current time coincides with the alarm time by this determination (YES), the speaker 60 is driven in the next step S6 to inform the alarm sound.

Next, when the register L0 is "1" in step S7, that is, when the mode for turning on the lighting device 60 is set (YES), the timer 63 is set to "1" in the next step S8. Increase, and determine whether or not the time measured by the three-hour timer 63 has reached three hours in step S9. If it is determined that three hours have been reached for each version, " 0 " is set in the register L0 to switch to the EL auto-off mode in which the lighting device 21 is not turned on.

That is, even when the lighting device 21 is set to a mode in which the lighting device 21 is turned on when there is a signal from the posture detection switch 19, the EL device is switched to the EL auto-off mode if three hours have elapsed since the setting was made in that mode. (21) is not turned on.

If it is determined in step S9 that 3 hours have not elapsed, the process proceeds to (S9, NO) and S11 to determine whether the flag G is "1". If it is determined that flag G = 1 is determined by this determination, the illuminating device 21 is turned on at the next step S12, and the two second timer 68 is increased by "1" at step S13. Thereafter, at step S14, it is determined whether or not the value of the 2-second timer 68 has reached 2 seconds, and if the value is 2 seconds, " 0 " is set at the flag G at step S15, and at step S16, The cumulative registers 66 and 67 are deleted.

That is, in the mode which turns on the illuminating device 21, when it passes for 2 second after turning on the illuminating device 21, it turns off automatically.

Thereafter, at step S17, it is determined whether or not the posture detection signal, which is the output signal of the posture detection switch 4, has been detected, and if a posture detection signal is detected, the process proceeds to step S18 and the detection process is executed.

Here, the content of the detection process of step S18 is demonstrated with reference to the flowchart of FIG.

First, in step S51, the number of times the attitude detection switch 19 is turned on is counted, and the count result is stored in the number register 66. FIG. In addition, in next step S52, the posture detection switch 19 counts the total of the time which turned on, and stores the count result in the accumulation register 67. As shown in FIG. In step S53, it is determined whether the value of the number register 66 exceeds "3". If the number of times is 3 or less, the flow advances to step S54. Whether the accumulated time of the accumulated register R37 exceeds "250 ms" is determined. Determine whether or not.

In the case where it is determined in step S53 that the number of times that the posture detection switch 19 has been turned over has exceeded three times, or when it is determined in step S54 that the cumulative on time of the posture detection switch 4 exceeds 250 ms, the watch 1 ) Is determined to be in a predetermined posture, for example, the user tilts the wrist watch forward and looks at the LCD 17, and sets "1" to the flag G in step S55 so that the lighting device 21 ) Lights up.

On the other hand, when the cumulative on-time of the posture detection switch 4 is 250 ms or less, it is determined that the watch 1 is not in a posture to see the LCD 17, and the processing ends in that state.

In this way, when the number of times that the attitude detection switch 19 is turned on is more than a predetermined number of times (three times in the embodiment), or when the cumulative on time exceeds a predetermined time (250ms in the embodiment), the lighting device 21 is turned on, Alternatively, it is possible to accurately detect the state of the switch of the posture detection switch 19 having a structure in which it is difficult to keep the off state stably.

If the detection process of step S18 of FIG. 16 is complete | finished as mentioned above, the display process of step S19 is performed next. In this display process, for example, if the operation mode at that time is the stopwatch mode, the stopwatch time under measurement is displayed on the LCD 17.

20A and 20B show the output waveform of the posture detection switch 19. FIG. The same figure shows a case where a high level signal is output when the posture detection switch 19 is on and a low level signal is output when the posture detection switch 19 is on. 20A shows the signal waveform of the posture detection signal when the posture detection switch 19 is repeatedly turned on and off, and when the on is the fourth time, it is determined that the user tilts the wrist forward by the above-described processing. Turn on (21).

20B shows the signal waveform of the posture detection signal when the on / off count of the posture detection switch 19 is twice, but the cumulative on time exceeds 250 ms. Judges that the wrist is tilted forward to see the display of the LCD 17, and turns on the lighting device 21.

In the above embodiment, the illumination device 21 is turned on by the posture detection switch 19 for three hours only in the stopwatch mode, but may be executed in another mode.

In addition, an operation switch for simply inverting the value of the register L0 from "0" to "1" and "1" to "0" is provided, and the value of the register L0 is set to "1" by this switch. The lighting device 21 may be turned on for a predetermined time by the input of the posture detection switch 19 only when it is in operation.

In the above embodiment, the example applied to the electronic watch of the digital display is explained, but the present invention can be applied to an instructional analog watch and can be applied to other electronic devices other than the wristwatch. In addition, the attitude | position detection switch 19 may also be a switch of a different structure, not only the switch of the structure described in an Example.

In this embodiment, when the S3 key is operated, the lighting device 21 turns on to read the display contents of the LCD 17 even in a dark place, and in the stopwatch mode, the lighting turns on or off according to the attitude of the device. Since the lighting can be turned on without performing a switch operation, the electronic device which has a posture detection function which is easier to use can be realized. In addition, since the mode for enabling the control of the lighting of the lighting and the light off according to the posture and other modes can be selected, the lighting device can be prevented from turning on when the lighting is not needed.

Claims (10)

An electronic apparatus comprising display means for displaying information, and an illumination device for illuminating the display means, comprising: posture detection switch means for detecting a posture of the electronic device and outputting a switch signal when a specific posture is reached; Control data storage means for storing any one of the control data for performing the lighting operation by the apparatus and the control data for inhibiting the lighting operation, the control data for performing the lighting operation to the control data storage means and the control data forbidding. Judgment means for determining which of the control data is stored; and when it is determined that the control data for performing the lighting operation is stored according to the judgment means, the electronic device is in a specific posture according to the attitude detection switch means. Is detected, the lighting operation is performed by the lighting apparatus. If it is the control data is stored to prohibit judgment according to the stage means, the electronic apparatus comprising the lighting operation control means for controlling so as not carried out jomyeong operation by the illumination device. 2. The lighting operation control means according to claim 1, wherein the illumination operation control means includes time measuring means for measuring a predetermined time, and counting means for counting the number of pulses of the signal output from the posture detection switch means during time measurement by the time measuring means. And means for operating said illuminating device when the count value by this counting means becomes a predetermined value. The electronic device of claim 1, wherein the display means comprises a liquid crystal display, and the illumination device comprises an electric luminescence device. The posture detection switch means according to claim 1, wherein the posture detection switch means includes a case, first and second fixed contacts spaced apart from each other in the case, and the first and second fixed contacts when the posture detection switch means is housed in the case so as to be movable. And a conductive member for electrically connecting a second fixed contact to output the switch signal. The electronic device according to claim 1, further comprising a switching switch for switching a mode in which the lighting device is not operated when the switch signal is output from the posture detecting switch means, and a mode for operating the lighting device. The electronic device according to claim 5, further comprising: a specification means for specifying which of the modes of operating the lighting device and the mode of operating the lighting device. The electronic device according to claim 5, wherein the mode of not operating the lighting device is a time display mode of displaying a current time, and the mode of operating is a mode of displaying stopwatch information. The method according to claim 5, further comprising a timer means for switching to a mode in which the lighting device is not operated when a predetermined time elapses after switching to the mode in which the lighting device is operated according to the switching operation switch. Electronic equipment. The electronic device according to claim 1, further comprising a time-measuring means for displaying the current time, wherein the current time obtained by the time-measuring means is displayed on the display means. The electronic device according to claim 1, wherein the display means, the illumination device, the posture detection switch means, and the illumination operation control means are housed in a wristwatch-shaped case mounted on a wrist.